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GeezerVison is showing github.com — [3.14] gh-161705: Prevent shadowing stdlib in gzip/tarfile/zipfile CLI (#161706) by vstinner · Pull Request #161719 · python/cpython

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@vstinner

@vstinner vstinner commented Nov 10, 2026 •
edited by bedevere-app Bot
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Remove sys.path[0] in gzip, tarfile and zipfile command line interface to prevent shadowing standard library modules from extracted files.

  • Add sys._path0 variable.
  • pymain_sys_path_add_path0() sets sys._path0.
  • Add runpy._remove_sys_path0().
  • gzip, tarfile and zipfile main functions now call _remove_sys_path0() to prevent shadowing stdlib modules from extracted files.

(cherry picked from commit e891a91)

  • Issue: [security] Prevent shadowing stdlib in gzip/tarfile/zipfile CLI [CVE-2026-115791] #161705

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@vstinner @gpshead
@ethanfurman @Eclips4
pythongh-161705: Prevent shadowing stdlib in gzip/tarfile/zipfile CLI (…
c04240b 
…python#161706)

Remove sys.path[0] in gzip, tarfile and zipfile command line
interface to prevent shadowing standard library modules from
extracted files.

* Add sys._path0 variable.
* pymain_sys_path_add_path0() sets sys._path0.
* Add runpy._remove_sys_path0().
* gzip, tarfile and zipfile main functions now call
  _remove_sys_path0() to prevent shadowing stdlib modules from
  extracted files.

Co-authored-by: Gregory P. Smith <[email protected]>
Co-authored-by: Ethan Furman <[email protected]>
Co-authored-by: Kirill Podoprigora <[email protected]>
(cherry picked from commit e891a91)
@vstinner
vstinner requested review from FFY00, ericsnowcurrently and ethanfurman as code owners November 10, 2026 00:01
@vstinner vstinner added needs backport to 3.11 only security fixes needs backport to 3.12 only security fixes needs backport to 3.13 only security fixes labels Nov 10, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Nov 10, 2026
gh-161705: Prevent shadowing stdlib in gzip/tarfile/zipfile CLI #161706
Merged
@bedevere-app bedevere-app Bot added the type-security A security issue label Nov 10, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Nov 10, 2026
[security] Prevent shadowing stdlib in gzip/tarfile/zipfile CLI [CVE-2026-115791] #161705
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@bedevere-app bedevere-app Bot added the awaiting core review label Nov 10, 2026
@read-the-docs-community

read-the-docs-community Bot commented Nov 10, 2026

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Documentation build overview

📚 cpython-previews | 🛠️ Build #35771150 | 📁 Comparing c04240b against main (e891a91)

  🔍 Preview build  

327 files changed · + 1 added · ± 305 modified · - 21 deleted

+ Added

  • library/asyncio-policy.html

± Modified

  • about.html
  • bugs.html
  • glossary.html
  • index.html
  • license.html
  • py-modindex.html
  • builtins/exceptions.html
  • builtins/functions.html
  • builtins/stdtypes.html
  • builtins/threadsafety.html
  • and 295 more...

- Deleted

  • _static/tachyon-example-flamegraph.html
  • _static/tachyon-example-heatmap.html
  • c-api/sentinel.html
  • c-api/slots.html
  • deprecations/c-api-pending-removal-in-3.19.html
  • deprecations/c-api-pending-removal-in-3.20.html
  • deprecations/pending-removal-in-3.20.html
  • deprecations/pending-removal-in-3.21.html
  • deprecations/soft-deprecations.html
  • extending/first-extension-module.html
  • and 11 more...
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@vstinner
vstinner enabled auto-merge (squash) November 10, 2026 00:09
@vstinner
vstinner merged commit 8aa5d65 into python:3.14 Nov 10, 2026
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@vstinner
vstinner deleted the sys_path0_14 branch November 10, 2026 00:35
@bedevere-app bedevere-app Bot removed the awaiting core review label Nov 10, 2026
@miss-islington-app

miss-islington-app Bot commented Nov 10, 2026

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Thanks @vstinner for the PR 🌮🎉.. I'm working now to backport this PR to: 3.11, 3.12, 3.13.
🐍🍒⛏🤖
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@miss-islington-app

miss-islington-app Bot commented Nov 10, 2026

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Sorry, @vstinner, I could not cleanly backport this to 3.13 due to a conflict.

Please backport manually with cherry_picker, see the devguide for more information.

cherry_picker 8aa5d657e4d3f1a4cca5ff6c976e2e868e0a9056 3.13
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@miss-islington-app miss-islington-app Bot assigned vstinner Nov 10, 2026
@miss-islington-app

miss-islington-app Bot commented Nov 10, 2026

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Sorry, @vstinner, I could not cleanly backport this to 3.12 due to a conflict.

Please backport manually with cherry_picker, see the devguide for more information.

cherry_picker 8aa5d657e4d3f1a4cca5ff6c976e2e868e0a9056 3.12
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@miss-islington-app

miss-islington-app Bot commented Nov 10, 2026

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Sorry, @vstinner, I could not cleanly backport this to 3.11 due to a conflict.

Please backport manually with cherry_picker, see the devguide for more information.

cherry_picker 8aa5d657e4d3f1a4cca5ff6c976e2e868e0a9056 3.11
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@bedevere-app

bedevere-app Bot commented Nov 10, 2026

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GH-161726 is a backport of this pull request to the 3.13 branch.
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@bedevere-app bedevere-app Bot removed the needs backport to 3.13 only security fixes label Nov 10, 2026
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@ethanfurman ethanfurman Awaiting requested review from ethanfurman ethanfurman is a code owner
@ericsnowcurrently ericsnowcurrently Awaiting requested review from ericsnowcurrently ericsnowcurrently is a code owner
@FFY00 FFY00 Awaiting requested review from FFY00 FFY00 is a code owner

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@vstinner
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